.ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  width: 400px;
  height: 380px;
  position: relative;
  left: 50%;
  top: 50%;
  transform: translate(-50%, 50%);
}

/* 以下代码不需要修改 */

li {
  width: 110px;
  height: 110px;
}

.ul li {
  box-sizing: border-box;
  margin: 10px;
  list-style: none;
  line-height: 100px;
  text-align: center;
  font-size: 20px;
  border-radius: 10px;
  cursor: pointer;
  background: linear-gradient(90deg, #72a8f8 0%, #3e93d3 50%, #5385e2 100%);
  text-shadow: 5px 5px 5px #1004ad;
  color: #ffffff;
}

#start {
  background: #1004ad;
}

.ul li.active {
  background: rgb(255, 153, 0);
  color: #ffffff;
}

#award {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  top: 100px;
  display: block;
  width: 320px;
  height: 40px;
  background-color: rgb(255, 255, 255);
  border-radius: 2px;
  box-shadow: rgba(0, 0, 0, 0.3) 0 0 3px 2px;
  letter-spacing: 2px;
  text-align: center;
  line-height: 40px;
}
